Which of the following is the smallest yes youve seen this b

Which of the following is the smallest? (yes, you\'ve seen this before, sort of Select one: DMA Ribose Gene Genome Chromosome Breast cancer can be caused by? Select one: BRCA1 mutation BRCA2 mutation Various environmental exposures Both (a) and (b)

Solution

Question 1.

Gene is the smallest among all.

Question 2.

Yes breast cancer in women can be caused by the harmful mutations either in BRCA 1 or BRCA 2.

BRCA 1 and BRCA 2 are nothing but the cells present in the breast which help in repairing the damaged DNA and destroy the DNA that cannot be repaired. If these BRCA cells itself get damaged then the DNA remains unrepaired leading to the risk in getting breast cancer

These mutations can be inherited from the parents. There is a 50% chance of inheriting the mutated gene from the parent who is already having mutation.